#tu{margin-top: 46px;box-shadow: 0px 0px 20px 10px rgba(0,0,0,0.5);}
.box{background: #629FCE;width: 200px;height: 30px;border-radius: 15px;position: relative;top: 50px;left: 50%;margin-left: -100px}
.slider{background: #F6F6F6;width: 100px;height: 30px;border-radius: 15px;position: absolute;transition: left 0.5s; -moz-transition: left 0.5s; -webkit-transition: left 0.5s;left:0}
span{height: 30px;line-height: 30px;color: #F6F6F6;font-weight: 800;}
.m{float: left;margin-left: 50px}
.w{float: right;margin-right: 50px}